Turret-lathe.



D. B BULLARD. TURRET LATHE.

(Appllcahon filed May 10 1898 1n: mamas mans ca. "mourns" wAsmuaYon. o.c

(No Model.)

l l l i WiZnesses= fimi w m KRW No. 670,837. Patented Mar. 26, I901.

D. B. BULLARD.

TURRET LATHE.

(Application filed May 10, 1898.)

(No Model.) 3 Sheets-Sheet 2.

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No. 670,837. Patented Mal". 26, mm. o. B. BULLARD.

TURBET LATHE. A

(Application filed May 10, 1898.) Y

3 Sheets-Sheet 3.

(No Model.)

U rrn STATES DUDLEY B. BULLARD, OF BRIDGEPOR'I, GONNECTICIVI, ASSIGNORTO THE EULLARD MACHINE TOOL COMPANY, OF SAME PLACE.

TURRET-LATHE.

SPEOIIEICATION'forming part of Letters Patent No. 670,837, dated March26, 1901.

Application filed May 10, 1898. Serial No. 680,268. (No model.)

To (Z6 2.071.077?) it may concern.-

Be it known that I, DUDLEY B. BULLARD, a citizen of the UnitedStates,residing at Bridge port, in the county of Fairtield and State ofCon necticut, have invented certain new and useful Improvements inTurret-Lathes, of which the following is a specification.

This invention relates particularly to trip and stop mechanisms for handand power fed turret-lathes; and the object of the invention is toprovide a mechanism that will automatically determine and limit theforward stroke of each tool of the turret, and thereby permit each toolto have an independent stroke.

In the drawings accompanying and forming a part of this specification,Figure 1 is a vertical section on the line 1 1, Fig. 2, of a bed, base,turret-slide, and turret of a turretmachiue fitted with my trip and stopmechanism. Fig. 2 is a plan and sectional view of the same parts as seenfrom above the line 2 2, 1. Fig. 3 is a transverse section through thebed, base, and slide as seen from the left of the line 3 3, Fig. 1. Fig.4 is a rear end view of the base and slide with the turret left off.Fig. 5 is a view of the feed mechanism for the turret-slide as seen fromthe right of the line 5 5, Fig. 3. Fig. 6 is a detail sectional planview of the revolving trip-rod journaled in the base. Fig. 7 is an endview of the same, showing the holes in the block 011 the trip-rod.

Similar reference-numbers designate like parts in all the figures of thedrawings.

1 is the bed of the machine, which supports upon its left-hand end (notshown) a suitable head-stock and chuck and such other parts as areessential in a complete turret-lathe. Upon the right-hand end of the bedare flat ways 2, supporting a movable base 3, which may be clamped atany desired position by suitable straps 4, Fig. 4. Upon the base ismounted a turret-slide 5, having upon its forward end a revolublehexagonal turret 6, pro vided with tool-holding apertures 7. Said turretis adapted to revolve upon a stud 8, recessed in the slide and clampedthereto by the screw 9. On the bottom of the turret are pins 10,corresponding in number to the toolholding apertures of the turret andprojecting downward into an annular recess 11 of the turret-slide. Themethod of locking the turret rigidly to the slide while aitool iscutting and of unlocking and revolving it for the purpose of throwing anew tool into working position is fully shown and described in myconcurren t application, Serial No. 680,269, filed May 10, 1898.

The turret-slide may be moved forward or backward on its base by meansof a handwheel 15 on the end of a transverse shaft 14, journaled in thebase, which carries a pinion l3, meshing with a rack 12, fastened on thelower side of the slide, or it may be fed forward automatically by meansof power transmitted to the transverse shaft through thefollowing-described train of gears, supported by a bracket in the rearof the base.

26 is a splined shaft extending along the rear side of the bed, suitablyconnected by belting or gearing to the revolving spindle of thehead-stock, which shaft travels through and imparts its motion to thegear 24, journaled by means of its sleeve in a swivelbracket 23. Meshingwith gear 24 is a gear 27, keyed to a short worm-shaft 28, journaled insaid swivel-bracket. The worm 29 engages a worm-wheel 18, pressed fastupon the sleeve of a pinion l7, revolving upon a stationary stud 19 inthe bracket 20. Said pinion meshes with a gear 16, which is keyed toandtransmits its power through the transverse pinionshaft 14., operatingthe turret-slide.

The bracket 23, supporting the main driving-shaft and worm, is swiveledby means of a screw 22 to a slide 21, adapted to be moved vertically inbracket 20. By raising or lowering this slide the worm and worm-gear areconnected or disconnected and the powerfeed thrown on or off. The slideis raised and locked in the position shown in the drawings by thefollowing means: Passing transversely through the bed is a two-partshaft 32 and 37, carrying on its rear end a segmental pinion 31, meshingwith a rack cut in the slide, and on its forward end a swiveled handle40, fulcrumed in a vertical slot 42 cut in the sleeve-bracket 4:1. Theshafts are r0- Said clutch, forced forward by a coiled spring 39, has aseries of teeth out upon its rim 3S, adapted to engage the teeth 35 of acorresponding non-revoluble clutch 34, pinned fast to the base, and totherebylock the rod '32 and its segmental pinion 31, supporting theslide in Working position against revolving.

By revolving the handle 40 in a horizontal plane about its fulcrum 42the clutch 36 is withdrawn from the locking-clutch 34 and the slidesupporting the worm in working contact with the worm-gear is permittedto drop until the pin 45 of the slide rests on the bottom of the slot 46in the bracket 20. To reconnect the worm and worm-gear, the slide israised by revolving the handle 40 in a vertical plane on the aXis of therod 37 until the clutch 36 is rotated sufficiently far for its teeth toengage the teeth of the non-revolving clutch 34, when the spring 39 willautomatically force and lock the clutches together. When the power-feedis not required, the clutches may be locked apart by revolving a knurledring 43 on the rod 37 sufficiently far to cause a pin 43, fastened inthe rod and shown recessed in a groove of the ring, to rest upon itsedge. For the purpose of throwing the feed out automatically, the clutch36 is provided with a shoulder 71, against which rests one arm of abell-crank 61, swiveled upon 2. lug of the bed, the other arm of whichis operated by a mechanism which is one form of embodiment of myinvention and which I will now describe.

On the rear end of the turret-slide is a bracket 47, which carries acircular series of bars 48, corresponding in number to the toolholdiugapertures in the turret, which may be adjusted lengthwise therein andfirmly clamped by the set'screws 49. For the purpose of more delicateadjustment the bars are fitted with screw-caps 50. The rear end of thebase is perforated with a series of holes 66, corresponding in number toand in line with the bars and of sufficient diameter to admit of theirpassage. Journaled in the base in the center of said series of holes andadapted to move a limited distance lengthwise is a revoluble trip-shaft51, the lefthand end of which is keyed to and adapted to slide through abevel gear revolubly mounted in a bracket 56, suspended from theturret-slide. Keyed to its right-hand end, which projects through thebase, is a block 52, perforated with the same number of holes 73, lessone, as there are holes in the base, and within the base, in contactwith one arm of the bell-crank 61, is keyed a disk 60, perforated withthe same number of holes as the base. This shaft is indirectly geared toand revolved by the turret by means of a short shaft 58, journaledperpendicularly in the turret-slide, which has keyed to its upper end astar-wheel 59, recessed in the upper surface of the slide, with its armsprojecting into the annular groove 11, and thus in the line of travel ofthe turret-pins 10, and which has 'pin.

keyed to its lower end a bevel-gear 57, meshing with the bevel-gear inthe bracket 56. The gearing is so proportioned that a completerevolution of the turret causes a complete revolution of the trip-shaft.The best method of uniting the turret and trip-shaft revolubly willdepend in each case upon the construction of the surrounding parts, andI do not intend by the foregoing description to limit my invention tothe particular means illustrated. When the slide is traveling forward,the holes of the block 52, the disk 60, and base 3 are in perfectalinement with each other, and the adjustable bars 48, with oneexception, enter and project into the base. The excepted bar impingesupon the non-perforated part of the block 52 and forces the trip-shaft51 forward until the disk 60, striking upon one arm of thebell-crank 61,revolves it sufficiently far for its other arm to release the clutches34 36 and throw out the power-feed.

To prevent the block 52 from striking the base before the power-feed isreleased, and thereby binding and breaking the feed-gearing, thedistance between the left-hand faces of the disks and the block 52 canbe adjusted in the. following manner, as shown fully in Fig. 6: The disk60 is fastened nonrotatably to the trip-shaft by a pin 62, which passesthrough a slot 69, cut lengthwise therein and of same width as thediameter of the A two-part rod 68 67, separated by the disk-pin 62, isinserted in the trip-shaft between a spring 70 and screw 72. By turningthe screw in the proper direction the disk and the block may beseparated or brought together.

The operation of the trip and stop mechanism is as follows: The toolsare first arranged serially in the turret in the order in which they areto be used. Then the adjusts able bars 48 of the slide are so clampedthat the relative projection of each serially, beginning with the baropposite the non-perforated section of the block, will correspond to thelength of travel required of each turrettool serially. The operator thenthrows in the power-feed by means of the clutch-handle 4O andthe turrettravels forward. When the turret-tool has all but traveled itspredetermined distance, the bar 48 at the end of the slide correspondingto that tool impinges upon the block 52 of the trip-rod, all barsprojecting-beyond the operative bar having passed through theperforations of the block 52, the disk 60, and the base. The movement ofthe turret-slide is imparted by theimpinging bar to the trip-shaft,which thereupon travels forward with the slide and causes the bell-crank61, by means of the disk 60, to revolve and unlock the clutches 34 36and to thus release the power-feed. The operator completes the remainderof the tools stroke by pressing on the hand-wheel 15 until the block 52strikes the base. By reversing the revolution of the hand-wheel theturret-slide Serial No. 680,269, filed May 10, 1898.

is caused to travel backward until the cutting-tool is released from itswork and the stop-bars withdrawn from the perforations of the block 52.The turret is then unlocked and a new tool revolved into position byhand or automatically by the mechanism shown and described in myconcurrent application, As the turret revolves the pins 10, projectingfrom its lower surface, strike the arms of the star-wheel 59 and causethe trip-shaft 51 to revolve a corresponding part of a revolution and tobring the non-perforated part of the disk 52 opposite the barcorresponding to the new tool thrown into working position. The turretis then relocked, the worm 29 again brought into mesh with the worm-gear18, and the forward travel of the new tool continued until the worm isautomatically released by the impingement of the bar corresponding tothe cutting-tool upon the block of the trip-rod, as previouslydescribed.

In the drawings and foregoing description the block 52 is shown anddescribed as automatically revolved by the turret. While automatic meansfor revolving the block are preferable, they are not at all necessary.My invention will perform its function as a trip and stop mechanism ifthe connections between the trip-shaft and turretviz. the starwheel 59,the shaft 58, and the bevelgears 57 55-are wholly discarded, providedthe trip shaft is journaled directly in the bracket 56 and the block isrevolved by hand as each new turret-tool is thrown into working position.

My invention may also be applied to handfed lathes and used simply as astop mechanism by discarding the disk 60 and revolvinp the block 52,either automatically, as shown, or by hand, the aforesaid star-wheel andbevel-gear being discarded.

Having thus described my invention, what I claim is- 1. In aturret-machine in combination, a base, a slide movable longitudinally onthe base, a turret revolubly mounted on and movable with said slide, anon-revoluble series of bars adjustably supported by the slide, and arotatable block adapted to be moved into position to oppose the travelof either bar of said series, substantially as specified.

2. In a turret-machine in combination, a base, a slide movablelongitudinally thereon, a turret revolubly mounted on and movable withthe slide, a non-revoluble series of bars adj ustably supported by theslide, a rotatable shaft journaled in the base, a block secured to theouter end of the shaft and adapted to be moved into the pat-h of eitherbar of the series, and means connecting the shaft with the turretwhereby the shaft is rotated as the turret is revolved, substantially asspecified.

3. In a ti'irret'machine in combination, a base, a slide movablelongitudinally thereon, a turret revolubly mounted on and movable withsaid slide, a non-revoluble series of bars adjustably supported by theslide, a shaft jourualedin the base, a connection between the shaft andthe turret whereby the shaft is rotated by the rotation of the turret,and a perforated block mounted on the end of the shaft an d arranged tosuccessively opp use the forward passage of each bar of the series asthe slide moves forward, substantially as specified.

4. In a turretanachine in combination, a base, a slide movable upon thebase andhaving an annular recess, a turret revolubly mounted on theslide, pins projecting from the turret into the annular recess, a seriesof bars adjustably supported by the slide, a shaft journaled in the baseand adapted to be moved therein longitudinally, a shaft journaled in theslide, a star-wheel attached to the upper end of the slide-shaft andarranged to be engaged by pins projecting from the turret, gearingbetween the slide-shaft and the base-shaft, and a perforated blockfastened to the outer end of the base-shaft, said block having a lessnumber of holes than there are stop-bars supported by the slide,substantially as specified.

5. In a turret-machine in combination, a base, a slide movable on thebase, a turret mounted on the slide, a non-revoluble series of barsadjustably supported by the slide, a revoluble block, susceptible oflongitudinal movement, mounted in the base in line with said bars, afeed mechanism for moving the slide, and means connecting the revolubleblock with the feed mechanism whereby the feed mechanism is thrown outof action by a slight longitudinal movement of the block arising fromthe impingement of one of the bars upon said block, substantially asspecified.

6. In a turret-machine in combination, a base, a slide movable on thebase, a turret mounted on the slide, a non-revoluble series of barsadjustably supported by the slide, a revoluble trip-shaft. mounted inthe base and susceptible of a limited longitudinal movement therein, aperforated block mounted on the trip-shaft in line with said bars, afeed mechanism for moving the slide, and means connecting the shaftbearing the block with the feed mechanism, whereby the feed mechanism isthrown out of action by a slight lon gitudinal movement of the shaftimparted by the engagement of one of the bars with the block,substantially as specified.

7. In a turret-machine in combination, a base, a slide movable on thebase, aturret mounted on the slide, a non-revoluble series of bars adjustably supported by the slide, a block susceptible of longitudinalmovement revolubly mounted in the baseline with, and adapted to berevolved into position to oppose the passage of, either one of saidbars, a connection between the block and the turret whereby the block isrotated as the turret is revolved, a feed mechanism for moving theslide, and means connecting the revoluble IIO block with the feedmechanism whereby the feed mechanism is thrown out of action by a slightlongitudinal movement of the block arising'from the impingement of oneof the bars upon said block, substantially as specified.

8. In a turret-machine in combination, a base, a slide having a turretrevolubly mounted thereon and bars adjustably supported thereby, atrip-shaft wit-h a perforated block in line with said bars and journaledlengthwise in the base so as to have a longitudinal movement, meansconnecting said shaft to and causing it to revolve with the turret, anda feed mechanism for moving the slide adapted to be thrown out of actionby the longitudinal movement of the trip-shaft, which is caused by theimpingement of one of said bars upon the face of said blocksubstantially as specified.

9. In a turret-machine in combination, a base, a slide having an annularrecess, a revoluble turret mounted on the slide, pins projecting fromthe lower surface of the turret into the recess, a series of barsadjustably supported by the slide, a shaft journaled in the base andadapted to be moved lengthwise, a shaft journaled in the slide with astarwheel secured to its upper end in position to be engaged by theprojecting pins of the turret, and a bevel-gear secured to its lower endand adapted to mesh with a bevel-gear keyed to the shaft journaled inthe base, a block attached to the outer end of the shaft journaled inthe base, said block being perforated with one less hole' than there aretool-holding apertures in the turret, and adapted to be so revolved bythe turret that a non-perforated part will be successively broughtopposite each bar of the series, and a power-feed mechanism designed tobe thrown out of action by gitudinal movement journaled in the base, a

slide movable longitudinally on the base, a revoluble turret mounted ontheslide, and connecting means that so unite the turret in all itsvarious longitudinal positions relative to the trip-shaft that arevolution of the turret produces an equal rotation of the tripshaft,substantially as specified.

11. In a turret-machine in combination, a slide, a shaft journaled insaid slide, a starwheel secured to one end of said shaft, a bevel-gearsecured to the other end of said shaft, a turret mounted on the slide,means connected with the turret for rotating the star-Wheel, a shaftlocated below the slide, a sleeve keyed upon said shaft, and a bevelgearattached to the sleeve and adapted to mesh with the gear .uponthe end ofthe starwheel shaft, substantially as specified.

12. In a turret-machine in combination, a slide, a turret revolublymounted on the slide,

I a non-revoluble series of bars adjustably supported by the slide, arevoluble shaft susceptible of longitudinal movement journaled in theslide in line with the center of the series of bars, a block on the endof the shaft, and connecting means between the turret and the shaftwhereby the block is revolved with the turret and successively broughtopposite each bar of the series, substantially as specitied.

DUDLEY B. BULLARD. Witnesses:

G. H. MOREHOUSE, I. D. MOLEOD.

